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Internal Combustion EnginesPrius Plug-In Proves More Fuel Efficient Than Hybrid Version in Road TrialPrius Plug-In Proves More Fuel Efficient Than Hybrid Version in Road Trial
Actual fuel savings depends on how far people drive their PHEVs, a Toyota engineer says. Nineteen miles a day saves 71% of fuel, compared with a hybrid Prius, and at 31 miles a day, the savings is 41%.